nsz Git - libfirm/blob - ir/lower/lower_dw.c

   1 /*
   2  * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower double word operations, i.e. 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <stdbool.h>
  32 #include <assert.h>
  33
  34 #include "error.h"
  35 #include "lowering.h"
  36 #include "irnode_t.h"
  37 #include "irgraph_t.h"
  38 #include "irmode_t.h"
  39 #include "iropt_t.h"
  40 #include "irgmod.h"
  41 #include "tv_t.h"
  42 #include "dbginfo_t.h"
  43 #include "iropt_dbg.h"
  44 #include "irflag_t.h"
  45 #include "firmstat.h"
  46 #include "irgwalk.h"
  47 #include "ircons.h"
  48 #include "irflag.h"
  49 #include "irtools.h"
  50 #include "debug.h"
  51 #include "set.h"
  52 #include "pmap.h"
  53 #include "pdeq.h"
  54 #include "irdump.h"
  55 #include "array_t.h"
  56 #include "irpass_t.h"
  57
  58 typedef struct lower_env_t lower_env_t;
  59
  60 /**
  61  * The type of a lower function.
  62  *
  63  * @param node   the node to be lowered
  64  * @param env    the lower environment
  65  */
  66 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
  67
  68 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  69 static set *intrinsic_fkt;
  70
  71 /** A map from (imode, omode) to conv function types. */
  72 static set *conv_types;
  73
  74 /** A map from a method type to its lowered type. */
  75 static pmap *lowered_type;
  76
  77 /** The types for the binop and unop intrinsics. */
  78 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  79
  80 /** the debug handle */
  81 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  82
  83 /**
  84  * An entry in the (op, imode, omode) -> entity map.
  85  */
  86 typedef struct op_mode_entry {
  87         const ir_op   *op;    /**< the op */
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  91 } op_mode_entry_t;
  92
  93 /**
  94  * An entry in the (imode, omode) -> tp map.
  95  */
  96 typedef struct conv_tp_entry {
  97         const ir_mode *imode; /**< the input mode */
  98         const ir_mode *omode; /**< the output mode */
  99         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
 100 } conv_tp_entry_t;
 101
 102 /**
 103  * Every double word node will be replaced,
 104  * we need some store to hold the replacement:
 105  */
 106 typedef struct node_entry_t {
 107         ir_node *low_word;    /**< the low word */
 108         ir_node *high_word;   /**< the high word */
 109 } node_entry_t;
 110
 111 enum lower_flags {
 112         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 113         CF_CHANGED      = 2,  /**< control flow was changed */
 114 };
 115
 116 /**
 117  * The lower environment.
 118  */
 119 struct lower_env_t {
 120         node_entry_t **entries;       /**< entries per node */
 121         ir_graph      *irg;
 122         struct obstack obst;          /**< an obstack holding the temporary data */
 123         ir_type   *l_mtp;              /**< lowered method type of the current method */
 124         ir_tarval *tv_mode_bytes;     /**< a tarval containing the number of bytes in the lowered modes */
 125         ir_tarval *tv_mode_bits;      /**< a tarval containing the number of bits in the lowered modes */
 126         pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
 127         ir_node  **lowered_phis;       /**< list of lowered phis */
 128         pmap      *proj_2_block;       /**< a map from ProjX to its destination blocks */
 129         ir_mode   *high_signed;        /**< doubleword signed type */
 130         ir_mode   *high_unsigned;      /**< doubleword unsigned type */
 131         ir_mode   *low_signed;         /**< word signed type */
 132         ir_mode   *low_unsigned;       /**< word unsigned type */
 133         ident     *first_id;           /**< .l for little and .h for big endian */
 134         ident     *next_id;            /**< .h for little and .l for big endian */
 135         const lwrdw_param_t *params;  /**< transformation parameter */
 136         unsigned flags;               /**< some flags */
 137         unsigned n_entries;           /**< number of entries */
 138         ir_type  *value_param_tp;     /**< the old value param type */
 139 };
 140
 141 /**
 142  * Create a method type for a Conv emulation from imode to omode.
 143  */
 144 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 145 {
 146         conv_tp_entry_t key, *entry;
 147         ir_type *mtd;
 148
 149         key.imode = imode;
 150         key.omode = omode;
 151         key.mtd   = NULL;
 152
 153         entry = (conv_tp_entry_t*)set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 154         if (! entry->mtd) {
 155                 int n_param = 1, n_res = 1;
 156
 157                 if (imode == env->high_signed || imode == env->high_unsigned)
 158                         n_param = 2;
 159                 if (omode == env->high_signed || omode == env->high_unsigned)
 160                         n_res = 2;
 161
 162                 /* create a new one */
 163                 mtd = new_type_method(n_param, n_res);
 164
 165                 /* set param types and result types */
 166                 n_param = 0;
 167                 if (imode == env->high_signed) {
 168                         set_method_param_type(mtd, n_param++, tp_u);
 169                         set_method_param_type(mtd, n_param++, tp_s);
 170                 } else if (imode == env->high_unsigned) {
 171                         set_method_param_type(mtd, n_param++, tp_u);
 172                         set_method_param_type(mtd, n_param++, tp_u);
 173                 } else {
 174                         ir_type *tp = get_type_for_mode(imode);
 175                         set_method_param_type(mtd, n_param++, tp);
 176                 }
 177
 178                 n_res = 0;
 179                 if (omode == env->high_signed) {
 180                         set_method_res_type(mtd, n_res++, tp_u);
 181                         set_method_res_type(mtd, n_res++, tp_s);
 182                 } else if (omode == env->high_unsigned) {
 183                         set_method_res_type(mtd, n_res++, tp_u);
 184                         set_method_res_type(mtd, n_res++, tp_u);
 185                 } else {
 186                         ir_type *tp = get_type_for_mode(omode);
 187                         set_method_res_type(mtd, n_res++, tp);
 188                 }
 189                 entry->mtd = mtd;
 190         } else {
 191                 mtd = entry->mtd;
 192         }
 193         return mtd;
 194 }
 195
 196 /**
 197  * Add an additional control flow input to a block.
 198  * Patch all Phi nodes. The new Phi inputs are copied from
 199  * old input number nr.
 200  */
 201 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 202 {
 203         int i, arity = get_irn_arity(block);
 204         ir_node **in, *phi;
 205
 206         assert(nr < arity);
 207
 208         NEW_ARR_A(ir_node *, in, arity + 1);
 209         for (i = 0; i < arity; ++i)
 210                 in[i] = get_irn_n(block, i);
 211         in[i] = cf;
 212
 213         set_irn_in(block, i + 1, in);
 214
 215         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 216                 for (i = 0; i < arity; ++i)
 217                         in[i] = get_irn_n(phi, i);
 218                 in[i] = in[nr];
 219                 set_irn_in(phi, i + 1, in);
 220         }
 221 }
 222
 223 /**
 224  * Add an additional control flow input to a block.
 225  * Patch all Phi nodes. The new Phi inputs are copied from
 226  * old input from cf tmpl.
 227  */
 228 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 229 {
 230         int i, arity = get_irn_arity(block);
 231         int nr = 0;
 232
 233         for (i = 0; i < arity; ++i) {
 234                 if (get_irn_n(block, i) == tmpl) {
 235                         nr = i;
 236                         break;
 237                 }
 238         }
 239         assert(i < arity);
 240         add_block_cf_input_nr(block, nr, cf);
 241 }
 242
 243 /**
 244  * Return the "operational" mode of a Firm node.
 245  */
 246 static ir_mode *get_irn_op_mode(ir_node *node)
 247 {
 248         switch (get_irn_opcode(node)) {
 249         case iro_Load:
 250                 return get_Load_mode(node);
 251         case iro_Store:
 252                 return get_irn_mode(get_Store_value(node));
 253         case iro_Div:
 254                 return get_irn_mode(get_Div_left(node));
 255         case iro_Mod:
 256                 return get_irn_mode(get_Mod_left(node));
 257         case iro_Cmp:
 258                 return get_irn_mode(get_Cmp_left(node));
 259         default:
 260                 return get_irn_mode(node);
 261         }
 262 }
 263
 264 /**
 265  * Walker, prepare the node links and determine which nodes need to be lowered
 266  * at all.
 267  */
 268 static void prepare_links(lower_env_t *env, ir_node *node)
 269 {
 270         ir_mode      *mode = get_irn_op_mode(node);
 271         node_entry_t *link;
 272         int           i;
 273
 274         if (mode == env->high_signed || mode == env->high_unsigned) {
 275                 unsigned idx = get_irn_idx(node);
 276                 /* ok, found a node that will be lowered */
 277                 link = OALLOCZ(&env->obst, node_entry_t);
 278
 279                 if (idx >= env->n_entries) {
 280                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 281                         unsigned old   = env->n_entries;
 282                         unsigned n_idx = idx + (idx >> 3);
 283
 284                         ARR_RESIZE(node_entry_t *, env->entries, n_idx);
 285                         memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
 286                         env->n_entries = n_idx;
 287                 }
 288                 env->entries[idx] = link;
 289                 env->flags |= MUST_BE_LOWERED;
 290         } else if (is_Conv(node)) {
 291                 /* Conv nodes have two modes */
 292                 ir_node *pred = get_Conv_op(node);
 293                 mode = get_irn_mode(pred);
 294
 295                 if (mode == env->high_signed || mode == env->high_unsigned) {
 296                         /* must lower this node either but don't need a link */
 297                         env->flags |= MUST_BE_LOWERED;
 298                 }
 299                 return;
 300         }
 301
 302         if (is_Proj(node)) {
 303                 /* link all Proj nodes to its predecessor:
 304                    Note that Tuple Proj's and its Projs are linked either. */
 305                 ir_node *pred = get_Proj_pred(node);
 306
 307                 set_irn_link(node, get_irn_link(pred));
 308                 set_irn_link(pred, node);
 309         } else if (is_Phi(node)) {
 310                 /* link all Phi nodes to its block */
 311                 ir_node *block = get_nodes_block(node);
 312                 add_Block_phi(block, node);
 313         } else if (is_Block(node)) {
 314                 /* fill the Proj -> Block map */
 315                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 316                         ir_node *pred = get_Block_cfgpred(node, i);
 317
 318                         if (is_Proj(pred))
 319                                 pmap_insert(env->proj_2_block, pred, node);
 320                 }
 321         }
 322 }
 323
 324 static node_entry_t *get_node_entry(lower_env_t *env, ir_node *node)
 325 {
 326         unsigned idx = get_irn_idx(node);
 327         assert(idx < env->n_entries);
 328         return env->entries[idx];
 329 }
 330
 331 static void set_lowered(lower_env_t *env, ir_node *old,
 332                         ir_node *new_low, ir_node *new_high)
 333 {
 334         node_entry_t *entry = get_node_entry(env, old);
 335         entry->low_word  = new_low;
 336         entry->high_word = new_high;
 337 }
 338
 339 /**
 340  * Translate a Constant: create two.
 341  */
 342 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 343 {
 344         ir_graph  *irg      = get_irn_irg(node);
 345         dbg_info  *dbg      = get_irn_dbg_info(node);
 346         ir_mode   *low_mode = env->low_unsigned;
 347         ir_tarval *tv       = get_Const_tarval(node);
 348         ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
 349         ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
 350         ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
 351         ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
 352         ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
 353
 354         set_lowered(env, node, res_low, res_high);
 355 }
 356
 357 /**
 358  * Translate a Load: create two.
 359  */
 360 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 361 {
 362         ir_mode    *low_mode = env->low_unsigned;
 363         ir_graph   *irg = get_irn_irg(node);
 364         ir_node    *adr = get_Load_ptr(node);
 365         ir_node    *mem = get_Load_mem(node);
 366         ir_node    *low, *high, *proj;
 367         dbg_info   *dbg;
 368         ir_node    *block = get_nodes_block(node);
 369         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 370                                  ? cons_volatile : cons_none;
 371
 372         if (env->params->little_endian) {
 373                 low  = adr;
 374                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 375         } else {
 376                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 377                 high = adr;
 378         }
 379
 380         /* create two loads */
 381         dbg  = get_irn_dbg_info(node);
 382         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 383         proj = new_r_Proj(low, mode_M, pn_Load_M);
 384         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 385
 386         set_lowered(env, node, low, high);
 387
 388         for (proj = (ir_node*)get_irn_link(node); proj;
 389              proj = (ir_node*)get_irn_link(proj)) {
 390                 switch (get_Proj_proj(proj)) {
 391                 case pn_Load_M:         /* Memory result. */
 392                         /* put it to the second one */
 393                         set_Proj_pred(proj, high);
 394                         break;
 395                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 396                         /* put it to the first one */
 397                         set_Proj_pred(proj, low);
 398                         break;
 399                 case pn_Load_res: {       /* Result of load operation. */
 400                         ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
 401                         ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
 402                         set_lowered(env, proj, res_low, res_high);
 403                         break;
 404                 }
 405                 default:
 406                         assert(0 && "unexpected Proj number");
 407                 }
 408                 /* mark this proj: we have handled it already, otherwise we might fall
 409                  * into out new nodes. */
 410                 mark_irn_visited(proj);
 411         }
 412 }
 413
 414 /**
 415  * Translate a Store: create two.
 416  */
 417 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 418 {
 419         ir_graph     *irg;
 420         ir_node      *block, *adr, *mem;
 421         ir_node      *low, *high, *proj;
 422         dbg_info     *dbg;
 423         ir_node            *value = get_Store_value(node);
 424         const node_entry_t *entry = get_node_entry(env, value);
 425         ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
 426                                    ? cons_volatile : cons_none;
 427         (void) mode;
 428
 429         assert(entry);
 430
 431         if (! entry->low_word) {
 432                 /* not ready yet, wait */
 433                 pdeq_putr(env->waitq, node);
 434                 return;
 435         }
 436
 437         irg = get_irn_irg(node);
 438         adr = get_Store_ptr(node);
 439         mem = get_Store_mem(node);
 440         block = get_nodes_block(node);
 441
 442         if (env->params->little_endian) {
 443                 low  = adr;
 444                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 445         } else {
 446                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 447                 high = adr;
 448         }
 449
 450         /* create two Stores */
 451         dbg = get_irn_dbg_info(node);
 452         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 453         proj = new_r_Proj(low, mode_M, pn_Store_M);
 454         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 455
 456         set_lowered(env, node, low, high);
 457
 458         for (proj = (ir_node*)get_irn_link(node); proj;
 459              proj = (ir_node*)get_irn_link(proj)) {
 460                 switch (get_Proj_proj(proj)) {
 461                 case pn_Store_M:         /* Memory result. */
 462                         /* put it to the second one */
 463                         set_Proj_pred(proj, high);
 464                         break;
 465                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 466                         /* put it to the first one */
 467                         set_Proj_pred(proj, low);
 468                         break;
 469                 default:
 470                         assert(0 && "unexpected Proj number");
 471                 }
 472                 /* mark this proj: we have handled it already, otherwise we might fall into
 473                  * out new nodes. */
 474                 mark_irn_visited(proj);
 475         }
 476 }
 477
 478 /**
 479  * Return a node containing the address of the intrinsic emulation function.
 480  *
 481  * @param method  the method type of the emulation function
 482  * @param op      the emulated ir_op
 483  * @param imode   the input mode of the emulated opcode
 484  * @param omode   the output mode of the emulated opcode
 485  * @param env     the lower environment
 486  */
 487 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 488                                       ir_mode *imode, ir_mode *omode,
 489                                       lower_env_t *env)
 490 {
 491         symconst_symbol sym;
 492         ir_entity *ent;
 493         op_mode_entry_t key, *entry;
 494
 495         key.op    = op;
 496         key.imode = imode;
 497         key.omode = omode;
 498         key.ent   = NULL;
 499
 500         entry = (op_mode_entry_t*)set_insert(intrinsic_fkt, &key, sizeof(key),
 501                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 502         if (! entry->ent) {
 503                 /* create a new one */
 504                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 505
 506                 assert(ent && "Intrinsic creator must return an entity");
 507                 entry->ent = ent;
 508         } else {
 509                 ent = entry->ent;
 510         }
 511         sym.entity_p = ent;
 512         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 513 }
 514
 515 /**
 516  * Translate a Div.
 517  *
 518  * Create an intrinsic Call.
 519  */
 520 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 521 {
 522         ir_node            *left        = get_Div_left(node);
 523         ir_node            *right       = get_Div_right(node);
 524         const node_entry_t *left_entry  = get_node_entry(env, left);
 525         const node_entry_t *right_entry = get_node_entry(env, right);
 526         ir_node            *block       = get_nodes_block(node);
 527         dbg_info           *dbgi        = get_irn_dbg_info(node);
 528         ir_type            *mtp
 529                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 530         ir_mode            *opmode = get_irn_op_mode(node);
 531         ir_node            *addr
 532                 = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 533         ir_node  *in[4] = {
 534                 left_entry->low_word, left_entry->high_word,
 535                 right_entry->low_word, right_entry->high_word };
 536         ir_node            *call
 537                 = new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
 538         ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 539         ir_node            *proj;
 540
 541         set_irn_pinned(call, get_irn_pinned(node));
 542
 543         for (proj = (ir_node*)get_irn_link(node); proj;
 544              proj = (ir_node*)get_irn_link(proj)) {
 545                 switch (get_Proj_proj(proj)) {
 546                 case pn_Div_M:         /* Memory result. */
 547                         /* reroute to the call */
 548                         set_Proj_pred(proj, call);
 549                         set_Proj_proj(proj, pn_Call_M);
 550                         break;
 551                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 552                         /* reroute to the call */
 553                         set_Proj_pred(proj, call);
 554                         set_Proj_proj(proj, pn_Call_X_except);
 555                         break;
 556                 case pn_Div_res: {
 557                         /* Result of computation. */
 558                         ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 559                         ir_node *res_high = new_r_Proj(resproj, mode,              1);
 560                         set_lowered(env, proj, res_low, res_high);
 561                         break;
 562                 }
 563                 default:
 564                         assert(0 && "unexpected Proj number");
 565                 }
 566                 /* mark this proj: we have handled it already, otherwise we might fall into
 567                  * out new nodes. */
 568                 mark_irn_visited(proj);
 569         }
 570 }
 571
 572 /**
 573  * Translate a Mod.
 574  *
 575  * Create an intrinsic Call.
 576  */
 577 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 578 {
 579         ir_node            *left        = get_Mod_left(node);
 580         ir_node            *right       = get_Mod_right(node);
 581         const node_entry_t *left_entry  = get_node_entry(env, left);
 582         const node_entry_t *right_entry = get_node_entry(env, right);
 583         ir_node            *in[4]       = {
 584                 left_entry->low_word, left_entry->high_word,
 585                 right_entry->low_word, right_entry->high_word
 586         };
 587         dbg_info           *dbgi        = get_irn_dbg_info(node);
 588         ir_node            *block       = get_nodes_block(node);
 589         ir_type            *mtp
 590                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 591         ir_mode            *opmode = get_irn_op_mode(node);
 592         ir_node            *addr
 593                 = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 594         ir_node            *call
 595                 = new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
 596         ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 597         ir_node            *proj;
 598         set_irn_pinned(call, get_irn_pinned(node));
 599
 600         for (proj = (ir_node*)get_irn_link(node); proj;
 601              proj = (ir_node*)get_irn_link(proj)) {
 602                 switch (get_Proj_proj(proj)) {
 603                 case pn_Mod_M:         /* Memory result. */
 604                         /* reroute to the call */
 605                         set_Proj_pred(proj, call);
 606                         set_Proj_proj(proj, pn_Call_M);
 607                         break;
 608                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 609                         /* reroute to the call */
 610                         set_Proj_pred(proj, call);
 611                         set_Proj_proj(proj, pn_Call_X_except);
 612                         break;
 613                 case pn_Mod_res: {
 614                         /* Result of computation. */
 615                         ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 616                         ir_node *res_high = new_r_Proj(resproj, mode,              1);
 617                         set_lowered(env, proj, res_low, res_high);
 618                         break;
 619                 }
 620                 default:
 621                         assert(0 && "unexpected Proj number");
 622                 }
 623                 /* mark this proj: we have handled it already, otherwise we might fall
 624                  * into out new nodes. */
 625                 mark_irn_visited(proj);
 626         }
 627 }
 628
 629 /**
 630  * Translate a binop.
 631  *
 632  * Create an intrinsic Call.
 633  */
 634 static void lower_binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 635 {
 636         ir_node            *left        = get_binop_left(node);
 637         ir_node            *right       = get_binop_right(node);
 638         const node_entry_t *left_entry  = get_node_entry(env, left);
 639         const node_entry_t *right_entry = get_node_entry(env, right);
 640         ir_node            *in[4]       = {
 641                 left_entry->low_word, left_entry->high_word,
 642                 right_entry->low_word, right_entry->high_word
 643         };
 644         dbg_info           *dbgi        = get_irn_dbg_info(node);
 645         ir_node            *block       = get_nodes_block(node);
 646         ir_graph           *irg         = get_irn_irg(block);
 647         ir_type            *mtp
 648                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 649         ir_node            *addr
 650                 = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 651         ir_node            *call
 652                 = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 653         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 654         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 655         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 656         set_irn_pinned(call, get_irn_pinned(node));
 657         set_lowered(env, node, res_low, res_high);
 658 }
 659
 660 /**
 661  * Translate a Shiftop.
 662  *
 663  * Create an intrinsic Call.
 664  */
 665 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 666 {
 667         ir_node            *block      = get_nodes_block(node);
 668         ir_node            *left       = get_binop_left(node);
 669         const node_entry_t *left_entry = get_node_entry(env, left);
 670         ir_node            *right      = get_binop_right(node);
 671         ir_node            *in[3]      = {
 672                 left_entry->low_word, left_entry->high_word,
 673                 /* it should be safe to conv to low_unsigned */
 674                 new_r_Conv(block, right, env->low_unsigned)
 675         };
 676         dbg_info           *dbgi       = get_irn_dbg_info(node);
 677         ir_graph           *irg        = get_irn_irg(block);
 678         ir_type            *mtp
 679                 = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 680         ir_node            *addr
 681                 = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 682         ir_node            *call
 683                 = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 3, in, mtp);
 684         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 685         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 686         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 687
 688         set_irn_pinned(call, get_irn_pinned(node));
 689         set_lowered(env, node, res_low, res_high);
 690 }
 691
 692 /**
 693  * Translate a Shr and handle special cases.
 694  */
 695 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 696 {
 697         ir_graph *irg   = get_irn_irg(node);
 698         ir_node  *right = get_Shr_right(node);
 699
 700         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 701                 ir_tarval *tv = get_Const_tarval(right);
 702
 703                 if (tarval_is_long(tv) &&
 704                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 705                         ir_node *block        = get_nodes_block(node);
 706                         ir_node *left         = get_Shr_left(node);
 707                         ir_mode *low_unsigned = env->low_unsigned;
 708                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 709                         const node_entry_t *left_entry = get_node_entry(env, left);
 710                         ir_node *res_low;
 711                         ir_node *res_high;
 712
 713                         left = left_entry->high_word;
 714
 715                         /* convert high word into low_unsigned mode if necessary */
 716                         if (get_irn_mode(left) != low_unsigned)
 717                                 left = new_r_Conv(block, left, low_unsigned);
 718
 719                         if (shf_cnt > 0) {
 720                                 ir_node *c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 721                                 res_low = new_r_Shr(block, left, c, low_unsigned);
 722                         } else {
 723                                 res_low = left;
 724                         }
 725                         res_high = new_r_Const(irg, get_mode_null(mode));
 726                         set_lowered(env, node, res_low, res_high);
 727
 728                         return;
 729                 }
 730         }
 731         lower_Shiftop(node, mode, env);
 732 }
 733
 734 /**
 735  * Translate a Shl and handle special cases.
 736  */
 737 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 738 {
 739         ir_graph *irg   = get_irn_irg(node);
 740         ir_node  *right = get_Shl_right(node);
 741
 742         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 743                 ir_tarval *tv = get_Const_tarval(right);
 744
 745                 if (tarval_is_long(tv)) {
 746                         long value = get_tarval_long(tv);
 747                     if (value >= (long)get_mode_size_bits(mode)) {
 748                                 /* simple case: shift above the lower word */
 749                                 ir_mode *mode_l;
 750                                 ir_node *block = get_nodes_block(node);
 751                                 ir_node *left = get_Shl_left(node);
 752                                 ir_node *c;
 753                                 long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 754                                 const node_entry_t *left_entry = get_node_entry(env, left);
 755                                 ir_node  *res_low;
 756                                 ir_node  *res_high;
 757
 758                                 left = left_entry->low_word;
 759                                 left = new_r_Conv(block, left, mode);
 760
 761                                 mode_l = env->low_unsigned;
 762                                 if (shf_cnt > 0) {
 763                                         c        = new_r_Const_long(irg, mode_l, shf_cnt);
 764                                         res_high = new_r_Shl(block, left, c, mode);
 765                                 } else {
 766                                         res_high = left;
 767                                 }
 768                                 res_low = new_r_Const(irg, get_mode_null(mode_l));
 769                                 set_lowered(env, node, res_low, res_high);
 770
 771                                 return;
 772                         }
 773                         if (value == 1) {
 774                                 /* left << 1 == left + left */
 775                                 ir_node            *left        = get_binop_left(node);
 776                                 const node_entry_t *left_entry  = get_node_entry(env, left);
 777                                 ir_node            *in[4]       = {
 778                                         left_entry->low_word, left_entry->high_word,
 779                                         left_entry->low_word, left_entry->high_word,
 780                                 };
 781                                 dbg_info           *dbgi        = get_irn_dbg_info(node);
 782                                 ir_node            *block       = get_nodes_block(node);
 783                                 ir_graph           *irg         = get_irn_irg(block);
 784                                 ir_type            *mtp
 785                                         = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 786                                 ir_node            *addr
 787                                         = get_intrinsic_address(mtp, op_Add, mode, mode, env);
 788                                 ir_node            *call
 789                                         = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 790                                 ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 791                                 ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 792                                 ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 793                                 set_irn_pinned(call, get_irn_pinned(node));
 794                                 set_lowered(env, node, res_low, res_high);
 795
 796                                 return;
 797                         }
 798                 }
 799         }
 800         lower_Shiftop(node, mode, env);
 801 }
 802
 803 /**
 804  * Translate a Shrs and handle special cases.
 805  */
 806 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 807 {
 808         ir_graph *irg   = get_irn_irg(node);
 809         ir_node  *right = get_Shrs_right(node);
 810
 811         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 812                 ir_tarval *tv = get_Const_tarval(right);
 813
 814                 if (tarval_is_long(tv) &&
 815                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 816                         ir_node *block         = get_nodes_block(node);
 817                         ir_node *left          = get_Shrs_left(node);
 818                         ir_mode *low_unsigned  = env->low_unsigned;
 819                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 820                         const node_entry_t *left_entry = get_node_entry(env, left);
 821                         ir_node *left_unsigned = left;
 822                         ir_node *res_low;
 823                         ir_node *res_high;
 824                         ir_node *c;
 825
 826                         left = left_entry->high_word;
 827
 828                         /* convert high word into low_unsigned mode if necessary */
 829                         if (get_irn_mode(left_unsigned) != low_unsigned)
 830                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
 831
 832                         if (shf_cnt > 0) {
 833                                 c       = new_r_Const_long(irg, low_unsigned, shf_cnt);
 834                                 res_low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
 835                         } else {
 836                                 res_low = left_unsigned;
 837                         }
 838
 839                         c        = new_r_Const(irg, get_mode_all_one(low_unsigned));
 840                         res_high = new_r_Shrs(block, left, c, mode);
 841                         set_lowered(env, node, res_low, res_high);
 842                         return;
 843                 }
 844         }
 845         lower_Shiftop(node, mode, env);
 846 }
 847
 848 /**
 849  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
 850  */
 851 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
 852 {
 853         lower_env_t *lenv = (lower_env_t*)env;
 854
 855         if (is_Rotl(node)) {
 856                 ir_mode  *mode = get_irn_op_mode(node);
 857                 ir_node  *right;
 858                 ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
 859                 ir_mode  *omode, *rmode;
 860                 ir_graph *irg;
 861                 dbg_info *dbg;
 862                 optimization_state_t state;
 863
 864                 if (mode != lenv->high_signed && mode != lenv->high_unsigned) {
 865                         prepare_links(lenv, node);
 866                         return;
 867                 }
 868
 869                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
 870                 right = get_Rotl_right(node);
 871                 irg   = get_irn_irg(node);
 872                 dbg   = get_irn_dbg_info(node);
 873                 omode = get_irn_mode(node);
 874                 left  = get_Rotl_left(node);
 875                 block = get_nodes_block(node);
 876                 shl   = new_rd_Shl(dbg, block, left, right, omode);
 877                 rmode = get_irn_mode(right);
 878                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
 879                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
 880                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
 881
 882                 /* switch optimization off here, or we will get the Rotl back */
 883                 save_optimization_state(&state);
 884                 set_opt_algebraic_simplification(0);
 885                 ornode = new_rd_Or(dbg, block, shl, shr, omode);
 886                 restore_optimization_state(&state);
 887
 888                 exchange(node, ornode);
 889
 890                 /* do lowering on the new nodes */
 891                 prepare_links(lenv, shl);
 892                 prepare_links(lenv, c);
 893                 prepare_links(lenv, sub);
 894                 prepare_links(lenv, shr);
 895                 prepare_links(lenv, ornode);
 896                 return;
 897         }
 898
 899         prepare_links(lenv, node);
 900 }
 901
 902 /**
 903  * Translate an Unop.
 904  *
 905  * Create an intrinsic Call.
 906  */
 907 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
 908 {
 909         ir_node            *op       = get_unop_op(node);
 910         const node_entry_t *op_entry = get_node_entry(env, op);
 911         ir_node            *in[2]    = { op_entry->low_word, op_entry->high_word };
 912         dbg_info           *dbgi     = get_irn_dbg_info(node);
 913         ir_node            *block    = get_nodes_block(node);
 914         ir_graph           *irg      = get_irn_irg(block);
 915         ir_type            *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
 916         ir_op              *irop     = get_irn_op(node);
 917         ir_node            *addr     = get_intrinsic_address(mtp, irop, mode, mode, env);
 918         ir_node            *nomem    = get_irg_no_mem(irg);
 919         ir_node            *call     = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
 920         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 921         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 922         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 923         set_irn_pinned(call, get_irn_pinned(node));
 924         set_lowered(env, node, res_low, res_high);
 925 }
 926
 927 /**
 928  * Translate a logical binop.
 929  *
 930  * Create two logical binops.
 931  */
 932 static void lower_binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
 933                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
 934 {
 935         ir_node            *left        = get_binop_left(node);
 936         ir_node            *right       = get_binop_right(node);
 937         const node_entry_t *left_entry  = get_node_entry(env, left);
 938         const node_entry_t *right_entry = get_node_entry(env, right);
 939         dbg_info           *dbgi        = get_irn_dbg_info(node);
 940         ir_node            *block       = get_nodes_block(node);
 941         ir_node            *res_low
 942                 = constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
 943                             env->low_unsigned);
 944         ir_node            *res_high
 945                 = constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
 946                             mode);
 947         set_lowered(env, node, res_low, res_high);
 948 }
 949
 950 static void lower_And(ir_node *node, ir_mode *mode, lower_env_t *env)
 951 {
 952         lower_binop_logical(node, mode, env, new_rd_And);
 953 }
 954
 955 static void lower_Or(ir_node *node, ir_mode *mode, lower_env_t *env)
 956 {
 957         lower_binop_logical(node, mode, env, new_rd_Or);
 958 }
 959
 960 static void lower_Eor(ir_node *node, ir_mode *mode, lower_env_t *env)
 961 {
 962         lower_binop_logical(node, mode, env, new_rd_Eor);
 963 }
 964
 965 /**
 966  * Translate a Not.
 967  *
 968  * Create two logical Nots.
 969  */
 970 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
 971 {
 972         ir_node            *op       = get_Not_op(node);
 973         const node_entry_t *op_entry = get_node_entry(env, op);
 974         dbg_info           *dbgi     = get_irn_dbg_info(node);
 975         ir_node            *block    = get_nodes_block(node);
 976         ir_node            *res_low
 977                 = new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
 978         ir_node            *res_high
 979                 = new_rd_Not(dbgi, block, op_entry->high_word, mode);
 980         set_lowered(env, node, res_low, res_high);
 981 }
 982
 983 /**
 984  * Translate a Cond.
 985  */
 986 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
 987 {
 988         ir_node *left, *right, *block;
 989         ir_node *sel = get_Cond_selector(node);
 990         ir_mode *m = get_irn_mode(sel);
 991         ir_mode *cmp_mode;
 992         const node_entry_t *lentry, *rentry;
 993         ir_node  *proj, *projT = NULL, *projF = NULL;
 994         ir_node  *new_bl, *irn;
 995         ir_node  *projHF, *projHT;
 996         ir_node  *dst_blk;
 997         ir_relation relation;
 998         ir_graph *irg;
 999         dbg_info *dbg;
1000
1001         (void) mode;
1002
1003         if (m != mode_b) {
1004                 if (m == env->high_signed || m == env->high_unsigned) {
1005                         /* bad we can't really handle Switch with 64bit offsets */
1006                         panic("Cond with 64bit jumptable not supported");
1007                 }
1008                 return;
1009         }
1010
1011         if (!is_Cmp(sel))
1012                 return;
1013
1014         left     = get_Cmp_left(sel);
1015         cmp_mode = get_irn_mode(left);
1016         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned)
1017                 return;
1018
1019         right  = get_Cmp_right(sel);
1020         lentry = get_node_entry(env, left);
1021         rentry = get_node_entry(env, right);
1022
1023         /* all right, build the code */
1024         for (proj = (ir_node*)get_irn_link(node); proj;
1025              proj = (ir_node*)get_irn_link(proj)) {
1026                 long proj_nr = get_Proj_proj(proj);
1027
1028                 if (proj_nr == pn_Cond_true) {
1029                         assert(projT == NULL && "more than one Proj(true)");
1030                         projT = proj;
1031                 } else {
1032                         assert(proj_nr == pn_Cond_false);
1033                         assert(projF == NULL && "more than one Proj(false)");
1034                         projF = proj;
1035                 }
1036                 mark_irn_visited(proj);
1037         }
1038         assert(projT && projF);
1039
1040         /* create a new high compare */
1041         block    = get_nodes_block(node);
1042         irg      = get_Block_irg(block);
1043         dbg      = get_irn_dbg_info(sel);
1044         relation = get_Cmp_relation(sel);
1045
1046         if (is_Const(right) && is_Const_null(right)) {
1047                 if (relation == ir_relation_equal || relation == ir_relation_less_greater) {
1048                         /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1049                         ir_mode *mode   = env->low_unsigned;
1050                         ir_node *low    = new_r_Conv(block, lentry->low_word, mode);
1051                         ir_node *high   = new_r_Conv(block, lentry->high_word, mode);
1052                         ir_node *ornode = new_rd_Or(dbg, block, low, high, mode);
1053                         ir_node *cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1054                         set_Cond_selector(node, cmp);
1055                         return;
1056                 }
1057         }
1058
1059         if (relation == ir_relation_equal) {
1060                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1061                 pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1062
1063                 assert(entry);
1064                 dst_blk = (ir_node*)entry->value;
1065
1066                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1067                                  ir_relation_equal);
1068                 dbg = get_irn_dbg_info(node);
1069                 irn = new_rd_Cond(dbg, block, irn);
1070
1071                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1072                 mark_irn_visited(projHF);
1073                 exchange(projF, projHF);
1074
1075                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1076                 mark_irn_visited(projHT);
1077
1078                 new_bl = new_r_Block(irg, 1, &projHT);
1079
1080                 dbg = get_irn_dbg_info(sel);
1081                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1082                                   ir_relation_equal);
1083                 dbg = get_irn_dbg_info(node);
1084                 irn = new_rd_Cond(dbg, new_bl, irn);
1085
1086                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1087                 mark_irn_visited(proj);
1088                 add_block_cf_input(dst_blk, projHF, proj);
1089
1090                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1091                 mark_irn_visited(proj);
1092                 exchange(projT, proj);
1093         } else if (relation == ir_relation_less_greater) {
1094                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1095                 pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1096
1097                 assert(entry);
1098                 dst_blk = (ir_node*)entry->value;
1099
1100                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1101                                  ir_relation_less_greater);
1102                 dbg = get_irn_dbg_info(node);
1103                 irn = new_rd_Cond(dbg, block, irn);
1104
1105                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1106                 mark_irn_visited(projHT);
1107                 exchange(projT, projHT);
1108
1109                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1110                 mark_irn_visited(projHF);
1111
1112                 new_bl = new_r_Block(irg, 1, &projHF);
1113
1114                 dbg = get_irn_dbg_info(sel);
1115                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1116                                  ir_relation_less_greater);
1117                 dbg = get_irn_dbg_info(node);
1118                 irn = new_rd_Cond(dbg, new_bl, irn);
1119
1120                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1121                 mark_irn_visited(proj);
1122                 add_block_cf_input(dst_blk, projHT, proj);
1123
1124                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1125                 mark_irn_visited(proj);
1126                 exchange(projF, proj);
1127         } else {
1128                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1129                 ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1130                 pmap_entry *entry;
1131
1132                 entry = pmap_find(env->proj_2_block, projT);
1133                 assert(entry);
1134                 dstT = (ir_node*)entry->value;
1135
1136                 entry = pmap_find(env->proj_2_block, projF);
1137                 assert(entry);
1138                 dstF = (ir_node*)entry->value;
1139
1140                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1141                                  relation & ~ir_relation_equal);
1142                 dbg = get_irn_dbg_info(node);
1143                 irn = new_rd_Cond(dbg, block, irn);
1144
1145                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1146                 mark_irn_visited(projHT);
1147                 exchange(projT, projHT);
1148                 projT = projHT;
1149
1150                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1151                 mark_irn_visited(projHF);
1152
1153                 newbl_eq = new_r_Block(irg, 1, &projHF);
1154
1155                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1156                                  ir_relation_equal);
1157                 irn = new_rd_Cond(dbg, newbl_eq, irn);
1158
1159                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1160                 mark_irn_visited(proj);
1161                 exchange(projF, proj);
1162                 projF = proj;
1163
1164                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1165                 mark_irn_visited(proj);
1166
1167                 newbl_l = new_r_Block(irg, 1, &proj);
1168
1169                 dbg = get_irn_dbg_info(sel);
1170                 irn = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word,
1171                                  relation);
1172                 dbg = get_irn_dbg_info(node);
1173                 irn = new_rd_Cond(dbg, newbl_l, irn);
1174
1175                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1176                 mark_irn_visited(proj);
1177                 add_block_cf_input(dstT, projT, proj);
1178
1179                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1180                 mark_irn_visited(proj);
1181                 add_block_cf_input(dstF, projF, proj);
1182         }
1183
1184         /* we have changed the control flow */
1185         env->flags |= CF_CHANGED;
1186 }
1187
1188 /**
1189  * Translate a Conv to higher_signed
1190  */
1191 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1192 {
1193         ir_mode  *omode        = get_irn_mode(node);
1194         ir_node  *op           = get_Conv_op(node);
1195         ir_mode  *imode        = get_irn_mode(op);
1196         ir_graph *irg          = get_irn_irg(node);
1197         ir_node  *block        = get_nodes_block(node);
1198         dbg_info *dbg          = get_irn_dbg_info(node);
1199         ir_node  *res_low;
1200         ir_node  *res_high;
1201
1202         ir_mode  *low_unsigned = env->low_unsigned;
1203         ir_mode  *low_signed
1204                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1205
1206         if (mode_is_int(imode) || mode_is_reference(imode)) {
1207                 if (imode == env->high_signed || imode == env->high_unsigned) {
1208                         /* a Conv from Lu to Ls or Ls to Lu */
1209                         const node_entry_t *op_entry = get_node_entry(env, op);
1210                         res_low  = op_entry->low_word;
1211                         res_high = new_rd_Conv(dbg, block, op_entry->high_word, low_signed);
1212                 } else {
1213                         /* simple case: create a high word */
1214                         if (imode != low_unsigned)
1215                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1216
1217                         res_low = op;
1218
1219                         if (mode_is_signed(imode)) {
1220                                 int      c       = get_mode_size_bits(low_signed) - 1;
1221                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1222                                 if (get_irn_mode(op) != low_signed)
1223                                         op = new_rd_Conv(dbg, block, op, low_signed);
1224                                 res_high = new_rd_Shrs(dbg, block, op, cnst, low_signed);
1225                         } else {
1226                                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1227                         }
1228                 }
1229         } else if (imode == mode_b) {
1230                 res_low  = new_rd_Conv(dbg, block, op, low_unsigned);
1231                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1232         } else {
1233                 ir_node *irn, *call;
1234                 ir_type *mtp = get_conv_type(imode, omode, env);
1235
1236                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1237                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1238                 set_irn_pinned(call, get_irn_pinned(node));
1239                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1240
1241                 res_low  = new_r_Proj(irn, low_unsigned, 0);
1242                 res_high = new_r_Proj(irn, low_signed, 1);
1243         }
1244         set_lowered(env, node, res_low, res_high);
1245 }
1246
1247 /**
1248  * Translate a Conv from higher_unsigned
1249  */
1250 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1251 {
1252         ir_node            *op    = get_Conv_op(node);
1253         ir_mode            *omode = get_irn_mode(node);
1254         ir_node            *block = get_nodes_block(node);
1255         dbg_info           *dbg   = get_irn_dbg_info(node);
1256         ir_graph           *irg   = get_irn_irg(node);
1257         const node_entry_t *entry = get_node_entry(env, op);
1258
1259         if (mode_is_int(omode) || mode_is_reference(omode)) {
1260                 op = entry->low_word;
1261
1262                 /* simple case: create a high word */
1263                 if (omode != env->low_unsigned)
1264                         op = new_rd_Conv(dbg, block, op, omode);
1265
1266                 set_Conv_op(node, op);
1267         } else if (omode == mode_b) {
1268                 /* llu ? true : false  <=> (low|high) ? true : false */
1269                 ir_mode *mode   = env->low_unsigned;
1270                 ir_node *ornode = new_rd_Or(dbg, block, entry->low_word,
1271                                             entry->high_word, mode);
1272                 set_Conv_op(node, ornode);
1273         } else {
1274                 ir_node *irn, *call, *in[2];
1275                 ir_mode *imode = get_irn_mode(op);
1276                 ir_type *mtp   = get_conv_type(imode, omode, env);
1277
1278                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1279                 in[0] = entry->low_word;
1280                 in[1] = entry->high_word;
1281
1282                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1283                 set_irn_pinned(call, get_irn_pinned(node));
1284                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1285
1286                 exchange(node, new_r_Proj(irn, omode, 0));
1287         }
1288 }
1289
1290 /**
1291  * lower Cmp
1292  */
1293 static void lower_Cmp(ir_node *cmp, ir_mode *m, lower_env_t *env)
1294 {
1295         ir_node  *l    = get_Cmp_left(cmp);
1296         ir_mode  *mode = get_irn_mode(l);
1297         ir_node  *r, *low, *high, *t, *res;
1298         ir_relation relation;
1299         ir_node  *blk;
1300         dbg_info *db;
1301         const node_entry_t *lentry;
1302         const node_entry_t *rentry;
1303         (void) m;
1304
1305         if (mode != env->high_signed && mode != env->high_unsigned) {
1306                 return;
1307         }
1308
1309         r        = get_Cmp_right(cmp);
1310         lentry   = get_node_entry(env, l);
1311         rentry   = get_node_entry(env, r);
1312         relation = get_Cmp_relation(cmp);
1313         blk      = get_nodes_block(cmp);
1314         db       = get_irn_dbg_info(cmp);
1315
1316         if (relation == ir_relation_equal) {
1317                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1318                 low  = new_rd_Cmp(db, blk, lentry->low_word, rentry->low_word,
1319                                   relation);
1320                 high = new_rd_Cmp(db, blk, lentry->high_word, rentry->high_word,
1321                                   relation);
1322                 res  = new_rd_And(db, blk, low, high, mode_b);
1323         } else if (relation == ir_relation_less_greater) {
1324                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1325                 low  = new_rd_Cmp(db, blk, lentry->low_word, rentry->low_word,
1326                                   relation);
1327                 high = new_rd_Cmp(db, blk, lentry->high_word, rentry->high_word,
1328                                   relation);
1329                 res = new_rd_Or(db, blk, low, high, mode_b);
1330         } else {
1331                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1332                 ir_node *high1 = new_rd_Cmp(db, blk, lentry->high_word,
1333                         rentry->high_word, relation & ~ir_relation_equal);
1334                 low  = new_rd_Cmp(db, blk, lentry->low_word, rentry->low_word,
1335                                   relation);
1336                 high = new_rd_Cmp(db, blk, lentry->high_word, rentry->high_word,
1337                                   ir_relation_equal);
1338                 t = new_rd_And(db, blk, low, high, mode_b);
1339                 res = new_rd_Or(db, blk, high1, t, mode_b);
1340         }
1341         exchange(cmp, res);
1342 }
1343
1344 /**
1345  * Translate a Conv.
1346  */
1347 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1348 {
1349         mode = get_irn_mode(node);
1350
1351         if (mode == env->high_signed || mode == env->high_unsigned) {
1352                 lower_Conv_to_Ll(node, env);
1353         } else {
1354                 ir_mode *op_mode = get_irn_mode(get_Conv_op(node));
1355
1356                 if (op_mode == env->high_signed || op_mode == env->high_unsigned) {
1357                         lower_Conv_from_Ll(node, env);
1358                 }
1359         }
1360 }
1361
1362 /**
1363  * Remember the new argument index of this value type entity in the lowered
1364  * method type.
1365  *
1366  * @param ent  the entity
1367  * @param pos  the argument index of this entity
1368  */
1369 static inline void set_entity_arg_idx(ir_entity *ent, size_t pos)
1370 {
1371         set_entity_link(ent, INT_TO_PTR(pos));
1372 }
1373
1374 /**
1375  * Retrieve the argument index of a value type entity.
1376  *
1377  * @param ent  the entity
1378  */
1379 static size_t get_entity_arg_idx(const ir_entity *ent) {
1380         return PTR_TO_INT(get_entity_link(ent));
1381 }
1382
1383 /**
1384  * Lower the method type.
1385  *
1386  * @param env  the lower environment
1387  * @param mtp  the method type to lower
1388  *
1389  * @return the lowered type
1390  */
1391 static ir_type *lower_mtp(lower_env_t *env, ir_type *mtp)
1392 {
1393         pmap_entry *entry;
1394         ident      *lid;
1395         ir_type    *res, *value_type;
1396
1397         if (is_lowered_type(mtp))
1398                 return mtp;
1399
1400         entry = pmap_find(lowered_type, mtp);
1401         if (! entry) {
1402                 size_t i, orig_n_params, orig_n_res, n_param, n_res;
1403
1404                 /* count new number of params */
1405                 n_param = orig_n_params = get_method_n_params(mtp);
1406                 for (i = orig_n_params; i > 0;) {
1407                         ir_type *tp = get_method_param_type(mtp, --i);
1408
1409                         if (is_Primitive_type(tp)) {
1410                                 ir_mode *mode = get_type_mode(tp);
1411
1412                                 if (mode == env->high_signed ||
1413                                         mode == env->high_unsigned)
1414                                         ++n_param;
1415                         }
1416                 }
1417
1418                 /* count new number of results */
1419                 n_res = orig_n_res = get_method_n_ress(mtp);
1420                 for (i = orig_n_res; i > 0;) {
1421                         ir_type *tp = get_method_res_type(mtp, --i);
1422
1423                         if (is_Primitive_type(tp)) {
1424                                 ir_mode *mode = get_type_mode(tp);
1425
1426                                 if (mode == env->high_signed ||
1427                                         mode == env->high_unsigned)
1428                                         ++n_res;
1429                         }
1430                 }
1431
1432                 res = new_type_method(n_param, n_res);
1433
1434                 /* set param types and result types */
1435                 for (i = n_param = 0; i < orig_n_params; ++i) {
1436                         ir_type *tp = get_method_param_type(mtp, i);
1437
1438                         if (is_Primitive_type(tp)) {
1439                                 ir_mode *mode = get_type_mode(tp);
1440
1441                                 if (mode == env->high_signed) {
1442                                         set_method_param_type(res, n_param++, tp_u);
1443                                         set_method_param_type(res, n_param++, tp_s);
1444                                 } else if (mode == env->high_unsigned) {
1445                                         set_method_param_type(res, n_param++, tp_u);
1446                                         set_method_param_type(res, n_param++, tp_u);
1447                                 } else {
1448                                         set_method_param_type(res, n_param++, tp);
1449                                 }
1450                         } else {
1451                                 set_method_param_type(res, n_param++, tp);
1452                         }
1453                 }
1454                 for (i = n_res = 0; i < orig_n_res; ++i) {
1455                         ir_type *tp = get_method_res_type(mtp, i);
1456
1457                         if (is_Primitive_type(tp)) {
1458                                 ir_mode *mode = get_type_mode(tp);
1459
1460                                 if (mode == env->high_signed) {
1461                                         set_method_res_type(res, n_res++, tp_u);
1462                                         set_method_res_type(res, n_res++, tp_s);
1463                                 } else if (mode == env->high_unsigned) {
1464                                         set_method_res_type(res, n_res++, tp_u);
1465                                         set_method_res_type(res, n_res++, tp_u);
1466                                 } else {
1467                                         set_method_res_type(res, n_res++, tp);
1468                                 }
1469                         } else {
1470                                 set_method_res_type(res, n_res++, tp);
1471                         }
1472                 }
1473                 set_lowered_type(mtp, res);
1474                 pmap_insert(lowered_type, mtp, res);
1475
1476                 value_type = get_method_value_param_type(mtp);
1477                 if (value_type != NULL) {
1478                         /* this creates a new value parameter type */
1479                         (void)get_method_value_param_ent(res, 0);
1480
1481                         /* set new param positions for all entities of the value type */
1482                         for (i = n_param = 0; i < orig_n_params; ++i) {
1483                                 ir_type   *tp  = get_method_param_type(mtp, i);
1484                                 ident     *id  = get_method_param_ident(mtp, i);
1485                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1486
1487                                 set_entity_arg_idx(ent, n_param);
1488                                 if (is_Primitive_type(tp)) {
1489                                         ir_mode *mode = get_type_mode(tp);
1490
1491                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1492                                                 if (id != NULL) {
1493                                                         lid = id_mangle(id, env->first_id);
1494                                                         set_method_param_ident(res, n_param, lid);
1495                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1496                                                         lid = id_mangle(id, env->next_id);
1497                                                         set_method_param_ident(res, n_param + 1, lid);
1498                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1499                                                 }
1500                                                 n_param += 2;
1501                                                 continue;
1502                                         }
1503                                 }
1504                                 if (id != NULL) {
1505                                         set_method_param_ident(res, n_param, id);
1506                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1507                                 }
1508                                 ++n_param;
1509                         }
1510
1511                         set_lowered_type(value_type, get_method_value_param_type(res));
1512                 }
1513         } else {
1514                 res = (ir_type*)entry->value;
1515         }
1516         return res;
1517 }
1518
1519 /**
1520  * Translate a Return.
1521  */
1522 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1523 {
1524         ir_graph  *irg = get_irn_irg(node);
1525         ir_entity *ent = get_irg_entity(irg);
1526         ir_type   *mtp = get_entity_type(ent);
1527         ir_node  **in;
1528         size_t     i, j, n;
1529         int        need_conv = 0;
1530         (void) mode;
1531
1532         /* check if this return must be lowered */
1533         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1534                 ir_node *pred = get_Return_res(node, i);
1535                 ir_mode *mode = get_irn_op_mode(pred);
1536
1537                 if (mode == env->high_signed || mode == env->high_unsigned)
1538                         need_conv = 1;
1539         }
1540         if (! need_conv)
1541                 return;
1542
1543         ent = get_irg_entity(irg);
1544         mtp = get_entity_type(ent);
1545
1546         mtp = lower_mtp(env, mtp);
1547         set_entity_type(ent, mtp);
1548
1549         /* create a new in array */
1550         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1551         in[0] = get_Return_mem(node);
1552
1553         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1554                 ir_node *pred      = get_Return_res(node, i);
1555                 ir_mode *pred_mode = get_irn_mode(pred);
1556
1557                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1558                         const node_entry_t *entry = get_node_entry(env, pred);
1559                         in[++j] = entry->low_word;
1560                         in[++j] = entry->high_word;
1561                 } else {
1562                         in[++j] = pred;
1563                 }
1564         }
1565
1566         set_irn_in(node, j+1, in);
1567 }
1568
1569 /**
1570  * Translate the parameters.
1571  */
1572 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1573 {
1574         ir_graph  *irg = get_irn_irg(node);
1575         ir_entity *ent = get_irg_entity(irg);
1576         ir_type   *tp  = get_entity_type(ent);
1577         ir_type   *mtp;
1578         long      *new_projs;
1579         size_t    i, j, n_params;
1580         int       rem;
1581         ir_node   *proj, *args;
1582         (void) mode;
1583
1584         if (is_lowered_type(tp)) {
1585                 mtp = get_associated_type(tp);
1586         } else {
1587                 mtp = tp;
1588         }
1589         assert(! is_lowered_type(mtp));
1590
1591         n_params = get_method_n_params(mtp);
1592         if (n_params <= 0)
1593                 return;
1594
1595         NEW_ARR_A(long, new_projs, n_params);
1596
1597         /* first check if we have parameters that must be fixed */
1598         for (i = j = 0; i < n_params; ++i, ++j) {
1599                 ir_type *tp = get_method_param_type(mtp, i);
1600
1601                 new_projs[i] = j;
1602                 if (is_Primitive_type(tp)) {
1603                         ir_mode *mode = get_type_mode(tp);
1604
1605                         if (mode == env->high_signed ||
1606                                 mode == env->high_unsigned)
1607                                 ++j;
1608                 }
1609         }
1610         if (i == j)
1611                 return;
1612
1613         mtp = lower_mtp(env, mtp);
1614         set_entity_type(ent, mtp);
1615
1616         /* switch off optimization for new Proj nodes or they might be CSE'ed
1617            with not patched one's */
1618         rem = get_optimize();
1619         set_optimize(0);
1620
1621         /* ok, fix all Proj's and create new ones */
1622         args = get_irg_args(irg);
1623         for (proj = (ir_node*)get_irn_link(node); proj;
1624              proj = (ir_node*)get_irn_link(proj)) {
1625                 ir_node *pred = get_Proj_pred(proj);
1626                 long proj_nr;
1627                 ir_mode *mode;
1628                 ir_mode *mode_l;
1629                 ir_mode *mode_h;
1630                 ir_node *res_low;
1631                 ir_node *res_high;
1632                 dbg_info *dbg;
1633
1634                 /* do not visit this node again */
1635                 mark_irn_visited(proj);
1636
1637                 if (pred != args)
1638                         continue;
1639
1640                 proj_nr = get_Proj_proj(proj);
1641                 set_Proj_proj(proj, new_projs[proj_nr]);
1642
1643                 mode = get_irn_mode(proj);
1644                 mode_l = env->low_unsigned;
1645                 if (mode == env->high_signed) {
1646                         mode_h = env->low_signed;
1647                 } else if (mode == env->high_unsigned) {
1648                         mode_h = env->low_unsigned;
1649                 } else {
1650                         continue;
1651                 }
1652
1653                 dbg = get_irn_dbg_info(proj);
1654                 res_low  = new_rd_Proj(dbg, args, mode_l, new_projs[proj_nr]);
1655                 res_high = new_rd_Proj(dbg, args, mode_h, new_projs[proj_nr] + 1);
1656                 set_lowered(env, proj, res_low, res_high);
1657         }
1658         set_optimize(rem);
1659 }
1660
1661 /**
1662  * Translate a Call.
1663  */
1664 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1665 {
1666         ir_type  *tp = get_Call_type(node);
1667         ir_type  *call_tp;
1668         ir_node  **in, *proj, *results;
1669         size_t   n_params, n_res;
1670         bool     need_lower = false;
1671         int      i, j;
1672         long     *res_numbers = NULL;
1673         (void) mode;
1674
1675         if (is_lowered_type(tp)) {
1676                 call_tp = get_associated_type(tp);
1677         } else {
1678                 call_tp = tp;
1679         }
1680
1681         assert(! is_lowered_type(call_tp));
1682
1683         n_params = get_method_n_params(call_tp);
1684         for (i = 0; i < n_params; ++i) {
1685                 ir_type *tp = get_method_param_type(call_tp, i);
1686
1687                 if (is_Primitive_type(tp)) {
1688                         ir_mode *mode = get_type_mode(tp);
1689
1690                         if (mode == env->high_signed || mode == env->high_unsigned) {
1691                                 need_lower = true;
1692                                 break;
1693                         }
1694                 }
1695         }
1696         n_res = get_method_n_ress(call_tp);
1697         if (n_res > 0) {
1698                 NEW_ARR_A(long, res_numbers, n_res);
1699
1700                 for (i = j = 0; i < n_res; ++i, ++j) {
1701                         ir_type *tp = get_method_res_type(call_tp, i);
1702
1703                         res_numbers[i] = j;
1704                         if (is_Primitive_type(tp)) {
1705                                 ir_mode *mode = get_type_mode(tp);
1706
1707                                 if (mode == env->high_signed || mode == env->high_unsigned) {
1708                                         need_lower = true;
1709                                         ++j;
1710                                 }
1711                         }
1712                 }
1713         }
1714
1715         if (! need_lower)
1716                 return;
1717
1718         /* let's lower it */
1719         call_tp = lower_mtp(env, call_tp);
1720         set_Call_type(node, call_tp);
1721
1722         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1723
1724         in[0] = get_Call_mem(node);
1725         in[1] = get_Call_ptr(node);
1726
1727         for (j = 2, i = 0; i < n_params; ++i) {
1728                 ir_node *pred      = get_Call_param(node, i);
1729                 ir_mode *pred_mode = get_irn_mode(pred);
1730
1731                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1732                         const node_entry_t *pred_entry = get_node_entry(env, pred);
1733                         in[j++] = pred_entry->low_word;
1734                         in[j++] = pred_entry->high_word;
1735                 } else {
1736                         in[j++] = pred;
1737                 }
1738         }
1739
1740         set_irn_in(node, j, in);
1741
1742         /* fix the results */
1743         results = NULL;
1744         for (proj = (ir_node*)get_irn_link(node); proj;
1745              proj = (ir_node*)get_irn_link(proj)) {
1746                 long proj_nr = get_Proj_proj(proj);
1747
1748                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1749                         /* found the result proj */
1750                         results = proj;
1751                         break;
1752                 }
1753         }
1754
1755         if (results != NULL) {    /* there are results */
1756                 int rem = get_optimize();
1757
1758                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1759                    with not patched one's */
1760                 set_optimize(0);
1761                 for (proj = (ir_node*)get_irn_link(results); proj; proj = (ir_node*)get_irn_link(proj)) {
1762                         if (get_Proj_pred(proj) == results) {
1763                                 long      proj_nr   = get_Proj_proj(proj);
1764                                 ir_mode  *proj_mode = get_irn_mode(proj);
1765                                 ir_mode  *mode_l;
1766                                 ir_mode  *mode_h;
1767                                 ir_node  *res_low;
1768                                 ir_node  *res_high;
1769                                 dbg_info *dbg;
1770
1771                                 /* found a result */
1772                                 mark_irn_visited(proj);
1773
1774                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1775
1776                                 mode_l = env->low_unsigned;
1777                                 if (proj_mode == env->high_signed) {
1778                                         mode_h = env->low_signed;
1779                                 } else if (proj_mode == env->high_unsigned) {
1780                                         mode_h = env->low_unsigned;
1781                                 } else {
1782                                         continue;
1783                                 }
1784
1785                                 dbg      = get_irn_dbg_info(proj);
1786                                 res_low  = new_rd_Proj(dbg, results, mode_l, res_numbers[proj_nr]);
1787                                 res_high = new_rd_Proj(dbg, results, mode_h, res_numbers[proj_nr] + 1);
1788                                 set_lowered(env, proj, res_low, res_high);
1789                         }
1790                 }
1791                 set_optimize(rem);
1792         }
1793 }
1794
1795 /**
1796  * Translate an Unknown into two.
1797  */
1798 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
1799 {
1800         ir_mode  *low_mode = env->low_unsigned;
1801         ir_graph *irg      = get_irn_irg(node);
1802         ir_node  *res_low  = new_r_Unknown(irg, low_mode);
1803         ir_node  *res_high = new_r_Unknown(irg, mode);
1804         set_lowered(env, node, res_low, res_high);
1805 }
1806
1807 /**
1808  * Translate a Phi.
1809  *
1810  * First step: just create two templates
1811  */
1812 static void lower_Phi(lower_env_t *env, ir_node *phi)
1813 {
1814         ir_mode  *mode = get_irn_mode(phi);
1815         int       i;
1816         int       arity;
1817         ir_node **in_l;
1818         ir_node **in_h;
1819         ir_node  *unk_l;
1820         ir_node  *unk_h;
1821         ir_node  *phi_l;
1822         ir_node  *phi_h;
1823         dbg_info *dbg;
1824         ir_node  *block;
1825         ir_graph *irg;
1826         ir_mode  *mode_l;
1827         ir_mode  *mode_h;
1828
1829         /* enqueue predecessors */
1830         arity = get_Phi_n_preds(phi);
1831         for (i = 0; i < arity; ++i) {
1832                 ir_node *pred = get_Phi_pred(phi, i);
1833                 pdeq_putr(env->waitq, pred);
1834         }
1835
1836         if (mode != env->high_signed && mode != env->high_unsigned)
1837                 return;
1838
1839         /* first create a new in array */
1840         NEW_ARR_A(ir_node *, in_l, arity);
1841         NEW_ARR_A(ir_node *, in_h, arity);
1842         irg    = get_irn_irg(phi);
1843         mode_l = env->low_unsigned;
1844         mode_h = mode == env->high_signed ? env->low_signed : env->low_unsigned;
1845         unk_l  = new_r_Dummy(irg, mode_l);
1846         unk_h  = new_r_Dummy(irg, mode_h);
1847         for (i = 0; i < arity; ++i) {
1848                 in_l[i] = unk_l;
1849                 in_h[i] = unk_h;
1850         }
1851
1852         dbg   = get_irn_dbg_info(phi);
1853         block = get_nodes_block(phi);
1854         phi_l = new_rd_Phi(dbg, block, arity, in_l, mode_l);
1855         phi_h = new_rd_Phi(dbg, block, arity, in_h, mode_h);
1856
1857         set_lowered(env, phi, phi_l, phi_h);
1858
1859         /* remember that we need to fixup the predecessors later */
1860         ARR_APP1(ir_node*, env->lowered_phis, phi);
1861
1862         /* Don't forget to link the new Phi nodes into the block.
1863          * Beware that some Phis might be optimized away. */
1864         if (is_Phi(phi_l))
1865                 add_Block_phi(block, phi_l);
1866         if (is_Phi(phi_h))
1867                 add_Block_phi(block, phi_h);
1868 }
1869
1870 static void fixup_phi(lower_env_t *env, ir_node *phi)
1871 {
1872         const node_entry_t *entry = get_node_entry(env, phi);
1873         ir_node            *phi_l = entry->low_word;
1874         ir_node            *phi_h = entry->high_word;
1875         int                 arity = get_Phi_n_preds(phi);
1876         int                 i;
1877
1878         /* exchange phi predecessors which are lowered by now */
1879         for (i = 0; i < arity; ++i) {
1880                 ir_node            *pred       = get_Phi_pred(phi, i);
1881                 const node_entry_t *pred_entry = get_node_entry(env, pred);
1882
1883                 set_Phi_pred(phi_l, i, pred_entry->low_word);
1884                 set_Phi_pred(phi_h, i, pred_entry->high_word);
1885         }
1886 }
1887
1888 /**
1889  * Translate a Mux.
1890  */
1891 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
1892 {
1893         ir_node            *truen       = get_Mux_true(mux);
1894         ir_node            *falsen      = get_Mux_false(mux);
1895         ir_node            *sel         = get_Mux_sel(mux);
1896         const node_entry_t *true_entry  = get_node_entry(env, truen);
1897         const node_entry_t *false_entry = get_node_entry(env, falsen);
1898         ir_node            *true_l      = true_entry->low_word;
1899         ir_node            *true_h      = true_entry->high_word;
1900         ir_node            *false_l     = false_entry->low_word;
1901         ir_node            *false_h     = false_entry->high_word;
1902         dbg_info           *dbgi        = get_irn_dbg_info(mux);
1903         ir_node            *block       = get_nodes_block(mux);
1904         ir_node            *res_low
1905                 = new_rd_Mux(dbgi, block, sel, false_l, true_l, env->low_unsigned);
1906         ir_node            *res_high
1907                 = new_rd_Mux(dbgi, block, sel, false_h, true_h, mode);
1908         set_lowered(env, mux, res_low, res_high);
1909 }
1910
1911 /**
1912  * Translate an ASM node.
1913  */
1914 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
1915 {
1916         ir_mode *his = env->high_signed;
1917         ir_mode *hiu = env->high_unsigned;
1918         int      i;
1919         ir_node *n;
1920
1921         (void)mode;
1922
1923         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
1924                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
1925                 if (op_mode == his || op_mode == hiu) {
1926                         panic("lowering ASM unimplemented");
1927                 }
1928         }
1929
1930         for (n = asmn;;) {
1931                 ir_mode *proj_mode;
1932
1933                 n = (ir_node*)get_irn_link(n);
1934                 if (n == NULL)
1935                         break;
1936
1937                 proj_mode = get_irn_mode(n);
1938                 if (proj_mode == his || proj_mode == hiu) {
1939                         panic("lowering ASM unimplemented");
1940                 }
1941         }
1942 }
1943
1944 /**
1945  * Translate a Sel node.
1946  */
1947 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
1948 {
1949         (void) mode;
1950
1951         /* we must only lower value parameter Sels if we change the
1952            value parameter type. */
1953         if (env->value_param_tp != NULL) {
1954                 ir_entity *ent = get_Sel_entity(sel);
1955             if (get_entity_owner(ent) == env->value_param_tp) {
1956                         size_t pos = get_entity_arg_idx(ent);
1957
1958                         ent = get_method_value_param_ent(env->l_mtp, pos);
1959                         set_Sel_entity(sel, ent);
1960                 }
1961         }
1962 }
1963
1964 /**
1965  * check for opcodes that must always be lowered.
1966  */
1967 static bool always_lower(unsigned code)
1968 {
1969         switch (code) {
1970         case iro_ASM:
1971         case iro_Proj:
1972         case iro_Start:
1973         case iro_Call:
1974         case iro_Return:
1975         case iro_Cond:
1976         case iro_Conv:
1977         case iro_Sel:
1978                 return true;
1979         default:
1980                 return false;
1981         }
1982 }
1983
1984 /**
1985  * Compare two op_mode_entry_t's.
1986  */
1987 static int cmp_op_mode(const void *elt, const void *key, size_t size)
1988 {
1989         const op_mode_entry_t *e1 = (const op_mode_entry_t*)elt;
1990         const op_mode_entry_t *e2 = (const op_mode_entry_t*)key;
1991         (void) size;
1992
1993         return (e1->op != e2->op) | (e1->imode != e2->imode) | (e1->omode != e2->omode);
1994 }
1995
1996 /**
1997  * Compare two conv_tp_entry_t's.
1998  */
1999 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2000 {
2001         const conv_tp_entry_t *e1 = (const conv_tp_entry_t*)elt;
2002         const conv_tp_entry_t *e2 = (const conv_tp_entry_t*)key;
2003         (void) size;
2004
2005         return (e1->imode != e2->imode) | (e1->omode != e2->omode);
2006 }
2007
2008 /**
2009  * Enter a lowering function into an ir_op.
2010  */
2011 static void enter_lower_func(ir_op *op, lower_func func)
2012 {
2013         op->ops.generic = (op_func)func;
2014 }
2015
2016 /**
2017  * Returns non-zero if a method type must be lowered.
2018  *
2019  * @param mtp  the method type
2020  */
2021 static bool mtp_must_be_lowered(lower_env_t *env, ir_type *mtp)
2022 {
2023         size_t i, n_params = get_method_n_params(mtp);
2024
2025         /* first check if we have parameters that must be fixed */
2026         for (i = 0; i < n_params; ++i) {
2027                 ir_type *tp = get_method_param_type(mtp, i);
2028
2029                 if (is_Primitive_type(tp)) {
2030                         ir_mode *mode = get_type_mode(tp);
2031
2032                         if (mode == env->high_signed ||
2033                                 mode == env->high_unsigned)
2034                                 return true;
2035                 }
2036         }
2037         return false;
2038 }
2039
2040 /* Determine which modes need to be lowered */
2041 static void setup_modes(lower_env_t *env)
2042 {
2043         unsigned           size_bits           = env->params->doubleword_size;
2044         ir_mode           *doubleword_signed   = NULL;
2045         ir_mode           *doubleword_unsigned = NULL;
2046         size_t             n_modes             = get_irp_n_modes();
2047         ir_mode_arithmetic arithmetic;
2048         unsigned           modulo_shift;
2049         size_t             i;
2050
2051         /* search for doubleword modes... */
2052         for (i = 0; i < n_modes; ++i) {
2053                 ir_mode *mode = get_irp_mode(i);
2054                 if (!mode_is_int(mode))
2055                         continue;
2056                 if (get_mode_size_bits(mode) != size_bits)
2057                         continue;
2058                 if (mode_is_signed(mode)) {
2059                         if (doubleword_signed != NULL) {
2060                                 /* sigh - the lowerer should really just lower all mode with
2061                                  * size_bits it finds. Unfortunately this required a bigger
2062                                  * rewrite. */
2063                                 panic("multiple double word signed modes found");
2064                         }
2065                         doubleword_signed = mode;
2066                 } else {
2067                         if (doubleword_unsigned != NULL) {
2068                                 /* sigh - the lowerer should really just lower all mode with
2069                                  * size_bits it finds. Unfortunately this required a bigger
2070                                  * rewrite. */
2071                                 panic("multiple double word unsigned modes found");
2072                         }
2073                         doubleword_unsigned = mode;
2074                 }
2075         }
2076         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2077                 panic("Couldn't find doubleword modes");
2078         }
2079
2080         arithmetic   = get_mode_arithmetic(doubleword_signed);
2081         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2082
2083         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2084         assert(size_bits % 2 == 0);
2085         assert(get_mode_sign(doubleword_signed) == 1);
2086         assert(get_mode_sign(doubleword_unsigned) == 0);
2087         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2088         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2089         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2090         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2091
2092         /* try to guess a sensible modulo shift for the new mode.
2093          * (This is IMO another indication that this should really be a node
2094          *  attribute instead of a mode thing) */
2095         if (modulo_shift == size_bits) {
2096                 modulo_shift = modulo_shift / 2;
2097         } else if (modulo_shift == 0) {
2098                 /* fine */
2099         } else {
2100                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2101         }
2102         size_bits /= 2;
2103
2104         /* produce lowered modes */
2105         env->high_signed   = doubleword_signed;
2106         env->high_unsigned = doubleword_unsigned;
2107         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2108                                          arithmetic, modulo_shift);
2109         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2110                                          arithmetic, modulo_shift);
2111 }
2112
2113 static void enqueue_preds(lower_env_t *env, ir_node *node)
2114 {
2115         int arity = get_irn_arity(node);
2116         int i;
2117
2118         for (i = 0; i < arity; ++i) {
2119                 ir_node *pred = get_irn_n(node, i);
2120                 pdeq_putr(env->waitq, pred);
2121         }
2122 }
2123
2124 static void lower_node(lower_env_t *env, ir_node *node)
2125 {
2126         int           arity;
2127         int           i;
2128         lower_func    func;
2129         ir_op        *op;
2130         ir_mode      *mode;
2131         unsigned      idx;
2132         node_entry_t *entry;
2133
2134         if (irn_visited(node))
2135                 return;
2136         mark_irn_visited(node);
2137
2138         /* cycles are always broken at Phi and Block nodes. So we don't need special
2139          * magic in all the other lower functions */
2140         if (is_Block(node)) {
2141                 enqueue_preds(env, node);
2142                 return;
2143         } else if (is_Phi(node)) {
2144                 lower_Phi(env, node);
2145                 return;
2146         }
2147
2148         /* depth-first: descend into operands */
2149         if (!is_Block(node)) {
2150                 ir_node *block = get_nodes_block(node);
2151                 lower_node(env, block);
2152         }
2153
2154         arity = get_irn_arity(node);
2155         for (i = 0; i < arity; ++i) {
2156                 ir_node *pred = get_irn_n(node, i);
2157                 lower_node(env, pred);
2158         }
2159
2160         op   = get_irn_op(node);
2161         func = (lower_func) op->ops.generic;
2162         if (func == NULL)
2163                 return;
2164
2165         idx   = get_irn_idx(node);
2166         entry = idx < env->n_entries ? env->entries[idx] : NULL;
2167         if (entry != NULL || always_lower(get_irn_opcode(node))) {
2168                 mode = get_irn_op_mode(node);
2169                 if (mode == env->high_signed) {
2170                         mode = env->low_signed;
2171                 } else {
2172                         mode = env->low_unsigned;
2173                 }
2174                 DB((dbg, LEVEL_1, "  %+F\n", node));
2175                 func(node, mode, env);
2176         }
2177 }
2178
2179 static void lower_irg(lower_env_t *env, ir_graph *irg)
2180 {
2181         ir_entity *ent;
2182         ir_type   *mtp;
2183         unsigned   n_idx;
2184
2185         obstack_init(&env->obst);
2186
2187         n_idx = get_irg_last_idx(irg);
2188         n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2189         env->n_entries = n_idx;
2190         env->entries   = NEW_ARR_F(node_entry_t*, n_idx);
2191         memset(env->entries, 0, sizeof(env->entries[0]) * n_idx);
2192
2193         env->irg            = irg;
2194         env->l_mtp          = NULL;
2195         env->flags          = 0;
2196         env->proj_2_block   = pmap_create();
2197         env->value_param_tp = NULL;
2198
2199         ent = get_irg_entity(irg);
2200         mtp = get_entity_type(ent);
2201
2202         if (mtp_must_be_lowered(env, mtp)) {
2203                 ir_type *ltp = lower_mtp(env, mtp);
2204                 env->flags |= MUST_BE_LOWERED;
2205                 set_entity_type(ent, ltp);
2206                 env->l_mtp = ltp;
2207                 env->value_param_tp = get_method_value_param_type(mtp);
2208         }
2209
2210         /* first step: link all nodes and allocate data */
2211         ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2212         irg_walk_graph(irg, firm_clear_node_and_phi_links,
2213                        prepare_links_and_handle_rotl, env);
2214
2215         if (env->flags & MUST_BE_LOWERED) {
2216                 size_t i;
2217                 ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
2218                 inc_irg_visited(irg);
2219
2220                 assert(pdeq_empty(env->waitq));
2221                 pdeq_putr(env->waitq, get_irg_end(irg));
2222
2223                 env->lowered_phis = NEW_ARR_F(ir_node*, 0);
2224                 while (!pdeq_empty(env->waitq)) {
2225                         ir_node *node = (ir_node*)pdeq_getl(env->waitq);
2226                         lower_node(env, node);
2227                 }
2228
2229                 /* we need to fixup phis */
2230                 for (i = 0; i < ARR_LEN(env->lowered_phis); ++i) {
2231                         ir_node *phi = env->lowered_phis[i];
2232                         fixup_phi(env, phi);
2233                 }
2234                 DEL_ARR_F(env->lowered_phis);
2235
2236
2237                 ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
2238
2239                 /* outs are invalid, we changed the graph */
2240                 set_irg_outs_inconsistent(irg);
2241
2242                 if (env->flags & CF_CHANGED) {
2243                         /* control flow changed, dominance info is invalid */
2244                         set_irg_doms_inconsistent(irg);
2245                         set_irg_extblk_inconsistent(irg);
2246                         set_irg_loopinfo_inconsistent(irg);
2247                 }
2248         }
2249
2250         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2251
2252         pmap_destroy(env->proj_2_block);
2253         DEL_ARR_F(env->entries);
2254         obstack_free(&env->obst, NULL);
2255 }
2256
2257 /*
2258  * Do the lowering.
2259  */
2260 void lower_dw_ops(const lwrdw_param_t *param)
2261 {
2262         lower_env_t lenv;
2263         size_t      i, n;
2264
2265         assert(param != NULL);
2266         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2267
2268         memset(&lenv, 0, sizeof(lenv));
2269         lenv.params = param;
2270         setup_modes(&lenv);
2271
2272         /* create the necessary maps */
2273         if (! intrinsic_fkt)
2274                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2275         if (! conv_types)
2276                 conv_types = new_set(cmp_conv_tp, 16);
2277         if (! lowered_type)
2278                 lowered_type = pmap_create();
2279
2280         /* create a primitive unsigned and signed type */
2281         if (! tp_u)
2282                 tp_u = get_type_for_mode(lenv.low_unsigned);
2283         if (! tp_s)
2284                 tp_s = get_type_for_mode(lenv.low_signed);
2285
2286         /* create method types for the created binop calls */
2287         if (! binop_tp_u) {
2288                 binop_tp_u = new_type_method(4, 2);
2289                 set_method_param_type(binop_tp_u, 0, tp_u);
2290                 set_method_param_type(binop_tp_u, 1, tp_u);
2291                 set_method_param_type(binop_tp_u, 2, tp_u);
2292                 set_method_param_type(binop_tp_u, 3, tp_u);
2293                 set_method_res_type(binop_tp_u, 0, tp_u);
2294                 set_method_res_type(binop_tp_u, 1, tp_u);
2295         }
2296         if (! binop_tp_s) {
2297                 binop_tp_s = new_type_method(4, 2);
2298                 set_method_param_type(binop_tp_s, 0, tp_u);
2299                 set_method_param_type(binop_tp_s, 1, tp_s);
2300                 set_method_param_type(binop_tp_s, 2, tp_u);
2301                 set_method_param_type(binop_tp_s, 3, tp_s);
2302                 set_method_res_type(binop_tp_s, 0, tp_u);
2303                 set_method_res_type(binop_tp_s, 1, tp_s);
2304         }
2305         if (! shiftop_tp_u) {
2306                 shiftop_tp_u = new_type_method(3, 2);
2307                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2308                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2309                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2310                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2311                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2312         }
2313         if (! shiftop_tp_s) {
2314                 shiftop_tp_s = new_type_method(3, 2);
2315                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2316                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2317                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2318                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2319                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2320         }
2321         if (! unop_tp_u) {
2322                 unop_tp_u = new_type_method(2, 2);
2323                 set_method_param_type(unop_tp_u, 0, tp_u);
2324                 set_method_param_type(unop_tp_u, 1, tp_u);
2325                 set_method_res_type(unop_tp_u, 0, tp_u);
2326                 set_method_res_type(unop_tp_u, 1, tp_u);
2327         }
2328         if (! unop_tp_s) {
2329                 unop_tp_s = new_type_method(2, 2);
2330                 set_method_param_type(unop_tp_s, 0, tp_u);
2331                 set_method_param_type(unop_tp_s, 1, tp_s);
2332                 set_method_res_type(unop_tp_s, 0, tp_u);
2333                 set_method_res_type(unop_tp_s, 1, tp_s);
2334         }
2335
2336         clear_irp_opcodes_generic_func();
2337         enter_lower_func(op_ASM,     lower_ASM);
2338         enter_lower_func(op_Add,     lower_binop);
2339         enter_lower_func(op_And,     lower_And);
2340         enter_lower_func(op_Call,    lower_Call);
2341         enter_lower_func(op_Cmp,     lower_Cmp);
2342         enter_lower_func(op_Cond,    lower_Cond);
2343         enter_lower_func(op_Const,   lower_Const);
2344         enter_lower_func(op_Conv,    lower_Conv);
2345         enter_lower_func(op_Div,     lower_Div);
2346         enter_lower_func(op_Eor,     lower_Eor);
2347         enter_lower_func(op_Load,    lower_Load);
2348         enter_lower_func(op_Minus,   lower_Unop);
2349         enter_lower_func(op_Mod,     lower_Mod);
2350         enter_lower_func(op_Mul,     lower_binop);
2351         enter_lower_func(op_Mux,     lower_Mux);
2352         enter_lower_func(op_Not,     lower_Not);
2353         enter_lower_func(op_Or,      lower_Or);
2354         enter_lower_func(op_Return,  lower_Return);
2355         enter_lower_func(op_Sel,     lower_Sel);
2356         enter_lower_func(op_Shl,     lower_Shl);
2357         enter_lower_func(op_Shr,     lower_Shr);
2358         enter_lower_func(op_Shrs,    lower_Shrs);
2359         enter_lower_func(op_Start,   lower_Start);
2360         enter_lower_func(op_Store,   lower_Store);
2361         enter_lower_func(op_Sub,     lower_binop);
2362         enter_lower_func(op_Unknown, lower_Unknown);
2363
2364         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2365         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2366         lenv.waitq         = new_pdeq();
2367         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2368         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2369
2370         /* transform all graphs */
2371         for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
2372                 ir_graph *irg = get_irp_irg(i);
2373                 lower_irg(&lenv, irg);
2374         }
2375         del_pdeq(lenv.waitq);
2376 }
2377
2378 /* Default implementation. */
2379 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2380                                     const ir_mode *imode, const ir_mode *omode,
2381                                     void *context)
2382 {
2383         char buf[64];
2384         ident *id;
2385         ir_entity *ent;
2386         (void) context;
2387
2388         if (imode == omode) {
2389                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2390         } else {
2391                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2392                         get_mode_name(imode), get_mode_name(omode));
2393         }
2394         id = new_id_from_str(buf);
2395
2396         ent = new_entity(get_glob_type(), id, method);
2397         set_entity_ld_ident(ent, get_entity_ident(ent));
2398         return ent;
2399 }